He said: “The Eurovision organisers must seek guarantees from the Azerbaijani government that it will respect human rights, that visitors to next year’s competition will not be victimised and that domestic and foreign media covering the event will be able to report freely, without harassment.”

Maxim Anmeghichean, of the International Lesbian and Gay Association, said Eurovision organisers should encourage the country to be more open to gay rights.

“Eurovision as a competition is popular among gay people . . . This is a good opportunity for Azerbaijan to move more towards openness,” he said.

Azerbaijan won Saturday’s contest in Dusseldorf with the song Running Scared, performed by the duo Ell/Nikki. It is the first time the country has won the contest.